Electric bond for rails.



No. 875,198. PATENTED DEC. 31. 1907.

F, M. MARGY, ELECTRIC BOND FOR RAILS.

APPLICATION FILED MAY 3.190s.

UNKEED critics.

FRANK M. MARGY, OF WORCESTER, MASSACHUSETTS.

nrinc'raio some roe RAILS.

specification of Letters Patent.

Patented Bee. $1. 1907.

Application filed May 3,1906. Serial No. 814,971

of lilassachusctts, have invented an inn provement in Electric Bonds for Rails, of

which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawings representing like parts.

This invention has for its object the pro duction of a novel electric bond, in which the copper conductor once embraced by the holder cannot thereafter be rotated to with draw the conductor from the holder. The end of the conductor is provided with a series of projections and spaces, preferably in the form 0 screw threads, and the interior of the holder is also shown as provided with projections and spaces, preferably screw threads, so that the spaces and projections of the conductor co-acting with the spaces and projections of the holder will cil'eot a close. fit and this lit once made,,the conductor and holder are thrown out of round, so that thermil ter the conductor cannot be rotated in and withdrawn from the holder.

The lit between the conductor and holder is such as to exclude water or moisture.

Figure 1 in side elevation shows the ends of two rails connected in accordance with my invention. Fig. 2 is a section in line :15, Fig. 1. Fig. 3 1s a section oi a rail showing the holder standing inv the rail. Fig. 4 is a similarview with the holder supposed to be driven into the rail and the holder and conductor being thrown out oi round by a blow or pressure to thus provide an irregular sun face in cross section, to prevent any rotation of the conductor ,in the hole, and Fig. 5 is a section. in line as, showing the threaded ends of the coi'iductor screwed into the hole or pocket in the holder; and Fig. 6 is a modification tobe described.

In the drawings, A, ll represent parts of the railroad rails that are to be connected by my novel electric bond, the same comprising two holders U and a coinluctor l). The conductor is a piece ol copper oi" any length, shape, or size in cross section, it being shown in Figs. 1 and 5 as round. and as having its ends provided with spaces and projections, preferably screw threads, as at d. The holders comprise heads 6 having tapered shanks o and each head is represented as provided with a hole or pocket 6 represented as extended but partially therethrough; said holes or pockets being represented as having spaces and. projections in the form of screw threads to be engaged by the ends of the conductor.

On referring to Figs. 3 and 5, it will be seen that the hole or pocket 0 extends substantially parallel to the end of the head 0 and that said head is provided with the projecting portion 3, and also that the pocket is situated comparatively close to the outer surface of the projecting portion 3 so that the wall 2 of said holeor pocket is comparatively thin.

The projecting portion 3 of the head constitutes what 1 term a blow-receiving portion because in driving the tapered shank of the holder into the holes of the rails formed for them a hammer or sledge is generally used and the blows thereof will be received by the portion 3. The force of the blows of the hammer or sledge flattens the blow-receiveng portion 3, as shown in Fig. 4,

and in doing so the sectional contour of both the pocket and the conductor is thrown out of round, said conductor and side of the pocket being flattened. When the conductor is screw-threaded as above described and is screw-threaded into the holder, this flattening of the side of the pocket and holder locks the conductor inv the holder so that it cannot be turned/to unscrew it from the holder.

Preferably the hole or pocket in the holder will extend but partially therethrough, so that under no conditions can. moisture or water meet the end of the conductor in the holder, although my invention is not limited in all instances to having the hole or pocket extend but partially through the holder.

Uniting the conductor and holder as described results in such intimate union of the ends of the conductorwith the holders, that moisture cannot enter the joint, nor, which is of the greatest im ortance, can the conductor once united wit the holder, be extricated by rotating the conductor in the holder.

While I prefer, for convenience, that the spaces and projections of the conductor and the holder shall be made by forming screw threads on the conductor and in the hole or pocket of theholder, yet this invention is not imited to the particular shape of the spaces and projections. These projections; resist the withdrawing oi the conductor from the holderby straining longitudinally. on the coiiductor, and. this efiec't would be gain-edit the proi'lictions and spaces were other than 5 screw t ea'ds, so long as the projection on 5 one might enter a space of the othersnd vice w verse. and thereafter-by swe. ,or'compression', the conductor and ho der lj'rnsy be :thrown out of-round to thus revent' the-rotation of the conductor in t 'e'holder, and 10 ..'1"urther serve to' resist any longitudinal .1 l strains on the conductor to"withdrew it "from the holder. This chengeof shape of the conductor and holder is one of the essential features oi my invention anditwillbe I I flat copper str p,

Having described my invention, what I "(claim as new and desire to secure by Letters Patient is I i 1. An electric'bond comprising a. conductor and two holders each having a, hole or ad-{pocket to receive the condnctor, each pocket resenting a. thin wall which is driven in or creed against the COIIdIiCl'LOlbY ressure suf- 'ficient to flatten the same am? secure the condnctor in the holder. s5 2 .An electric bond comprising a conductor and a holderthereforprovided with a. conductor-receiving pocket and presenting s projecting hloit -receiving end, and holders haying fiortion at one side of the pochet'whereby w en said holderis driven into :1. mil by s. hlow delivered on the "blow-receiving portion the wel of the pocket is flattened at said side and forced into inti mete contsctwith the conductor.

3. An electric bond comprising e. conelector halving a seriesofprojecti'ons at each corresponding recesses' engaging the projections of the conductors, the holder and the conductor near its ends being out of round to "restrain s ro-- tation of the conductors in the holder.

4. An electric bond, presenting a holder screw threaded internally, a conductor threaded externally that the threads of the conductor may engage the threads of the holder, a contacting portion of the holder and conductor being flattened or thrown out of round to prevent the conductor from being rotated in the holder.

5. An electric bond presenting a hold-s1.

having it hole or Eocket extended but partislly therethroug and presenting a thin well substsntielly parallel with said hole or pocket, and a conductor in said hole or pocket, a portion of the hol er and con ductor being thrown out of round to prevent the rotstion of the conductor in the hole.

In testimony whereof, I have signed my name to this specifiestion, in the presence of two subscribing witnesses. J

FRANK B IJMARCY;

H Witnesses:

' I Jenn C. EnwAnns,

MARGARET A. DUNN. 

